Message boards : Number crunching : lhc@home and simd
Message board moderation

To post messages, you must log in.

AuthorMessage
pier

Send message
Joined: 10 Sep 08
Posts: 3
Credit: 0
RAC: 0
Message 20348 - Posted: 14 Sep 2008, 15:04:00 UTC

l@h use simd?

like sse, sse2, 3dnow, mmx ?

Thx for anwsers.
ID: 20348 · Report as offensive     Reply Quote
pier

Send message
Joined: 10 Sep 08
Posts: 3
Credit: 0
RAC: 0
Message 20390 - Posted: 16 Sep 2008, 20:00:57 UTC - in response to Message 20348.  

someone can reply!?
ID: 20390 · Report as offensive     Reply Quote
Klimax

Send message
Joined: 27 Apr 07
Posts: 18
Credit: 9,970
RAC: 0
Message 20417 - Posted: 18 Sep 2008, 10:33:56 UTC

At most I think mmx.,but not sure.
ID: 20417 · Report as offensive     Reply Quote
tullio

Send message
Joined: 19 Feb 08
Posts: 708
Credit: 4,336,250
RAC: 0
Message 20420 - Posted: 18 Sep 2008, 16:23:41 UTC - in response to Message 20348.  

l@h use simd?

like sse, sse2, 3dnow, mmx ?

Thx for anwsers.

At SETI@home you can choose an optimized application for your OS and your CPU with SIMD support. However, the latest program called Astropulse so far does not run on optimized applications and runs only on the standard SETI client. Also note tha SETI apps are open source, like BOINC, that is you can download the source code and modify it, if you dare!
Tullio
ID: 20420 · Report as offensive     Reply Quote
pier

Send message
Joined: 10 Sep 08
Posts: 3
Credit: 0
RAC: 0
Message 20430 - Posted: 19 Sep 2008, 7:03:32 UTC - in response to Message 20420.  

l@h use simd?

like sse, sse2, 3dnow, mmx ?

Thx for anwsers.

At SETI@home you can choose an optimized application for your OS and your CPU with SIMD support. However, the latest program called Astropulse so far does not run on optimized applications and runs only on the standard SETI client. Also note tha SETI apps are open source, like BOINC, that is you can download the source code and modify it, if you dare!
Tullio


seti are useless...
thanks for replies!!
So, lhc prefer to keep more compatibility instead of performace.
rigth choose is a scientific result, anyway simd are very powerful.
ID: 20430 · Report as offensive     Reply Quote
Grutte Pier [Wa oars]~GP500

Send message
Joined: 22 Jan 06
Posts: 21
Credit: 125,903
RAC: 0
Message 20438 - Posted: 20 Sep 2008, 11:47:08 UTC

most prabaly sse and sse2.

This app. is not that old and SSE2 even has been here for more then 5 years i tink, P4\'s amd K7.

If they used a good compiler, wich i tink they do.
It is auto on when able.
ID: 20438 · Report as offensive     Reply Quote
Profile Keck_Komputers

Send message
Joined: 1 Sep 04
Posts: 275
Credit: 2,652,452
RAC: 0
Message 20448 - Posted: 20 Sep 2008, 19:13:03 UTC

The reason the sixtrack app may not use simd instructions is for compatibility. They need identical results. They do not even use standard math libs for this reason, since those can vary for each generation of CPU.
BOINC WIKI

BOINCing since 2002/12/8
ID: 20448 · Report as offensive     Reply Quote

Message boards : Number crunching : lhc@home and simd


©2024 CERN